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EVOLUTION DES NITRATES DANS LES GOUVERNORATS DU CENTRE EN 2004<br />

500<br />

450<br />

400<br />

350<br />

300<br />

NO 3 en mg/l<br />

250<br />

200<br />

150<br />

100<br />

50<br />

0<br />

Kairouan<br />

Kasserine<br />

Sousse<br />

Monastir<br />

Mahdia<br />

Sfax<br />

GOUVERNORAT<br />

NPh Min NPh Maxi NPr Mini NPr Maxi<br />

19

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